* {
    margin: 0;
    padding: 0;
}

/*share_start*/
#share {
    position: fixed;
    bottom: 50%;
    right: 10px;
    width: 30px;
    zoom: 1;
}

#share a {
    background-image: url(https://kesai.gitee.io/kesai_scripts/returnTop/share.png);
    background-repeat: no-repeat;
    display: block;
    width: 30px;
    height: 30px;
    margin-bottom: 2px;
    overflow: hidden;
    text-indent: -999px;
    -webkit-transition: all 0.2s ease-in-out;
    -moz-transition: all 0.2s ease-in-out;
    -o-transition: all 0.2s ease-in-out;
    -ms-transition: all 0.2s ease-in-out;
    transition: all 0.2s ease-in-out;
}

#share a#totop {
    background-position: 0 0px;
    position: absolute;
    bottom: 20px;
    cursor: pointer;
}

#share a#totop:hover {
    background-position: -30px 0px;
}